CN1827373A - Exposure curing method for light-curable ink and ink-jet recording device - Google Patents
Exposure curing method for light-curable ink and ink-jet recording device Download PDFInfo
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- CN1827373A CN1827373A CN 200510052916 CN200510052916A CN1827373A CN 1827373 A CN1827373 A CN 1827373A CN 200510052916 CN200510052916 CN 200510052916 CN 200510052916 A CN200510052916 A CN 200510052916A CN 1827373 A CN1827373 A CN 1827373A
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Abstract
The invention discloses an exposure-solidifying method for forming ink layer on recording medium. Wherein, said ink comprises at least one solvent which can aggregate in acid condition; one light-acid generator which can generate acid in light; and a one colorant. Said method comprises two irradiation steps: 1, using the light source with first illumination peak to irradiate the ink layer to make the light-acid generator generate acid to accelerate the acid dispersion in ink layer and solidify the ink layer; 2, using the light source with second illumination peak that higher than first one to irradiate the ink layer, to generate more acid and make it dispersed in ink layer to solidify the ink layer completely.
Description
Technical field
The present invention relates to a kind of exposure solidification method of light-cured type printing ink, the acid cure that this printing ink generates in the time of can being subjected to illumination by it.The invention still further relates to a kind of ink-jet recording apparatus.
Background technology
In the printer system that adopts UV printing ink,, therefore can obtain the higher printed matter of quality because ultraviolet radiation can make the ink lay that prints off non-fluidization immediately.But common UV printing ink still is accompanied by following problems: when print surface (surface of promptly printing thereon) is when being made by absorbing medium, the printing ink that absorbs absorption paper inside is not easy to solidify and therefore produces irritating printing ink flavor.
In order to promote the curing of ink lay, proposed to be equipped with the ink-jet recording apparatus of heater block.In this case, use therein printing ink is photocurable jetted ink, and it contains the light-acid forming agent, colouring agent component that can generate acid when illumination and can be at the solvent that has polymerization under the situation of above-mentioned acid.This jetted ink is designed to when printing ink heats, and the acid that is used as catalyst can be diffused into polymerization or the curing of ink lay inside to promote this printing ink.Although thus even can solidify the printing ink that has infiltrated deeply in the absorption paper easily, the printing equipment of heater block also must employing be furnished with in the use of this printing ink in addition.
In addition, because the rate of change of spot diameter is different because of the difference of recording medium kind behind the printing ink bump print surface, the selected same time is carried out illumination if do not consider the kind of recording medium, and the spot diameter after the curing will fluctuate, and makes the quality of printing image inconsistent thus.Therefore, also proposed a kind of ink-jet recording apparatus that is equipped with a plurality of light sources, these light sources are optionally opened in many ways according to the kind of recording medium, so that make the spot diameter unanimity behind the ink solidification.
If the light-cured type printing ink of the acid cure that generates can be subjected to illumination by this printing ink the time, only adopt illumination just can not make this acid fully be diffused in the recording medium, thereby produce the ink solidification defective, can not on recording medium, form gratifying printing image thus.Therefore, light-cured type printing ink heats after illumination usually, solidifies depths that required acid can fully be diffused into ink lay with cured printing ink so that make, and can form gratifying printing image thus on recording medium.Therefore, ink-jet recording apparatus needs to be equipped with a heater block that is used to add thermal recording media and light-cured type printing ink in this case, therefore must adopt a cover large-scale plant.In addition, the tape deck of being furnished with heater block is not easy to regulate.
Also proposed to adopt the heat cured printing ink layer that sends in the light-emitting device.Yet if luminous output quantity excessively increases, the surface portion of ink lay will solidify in advance, thereby the inside of ink lay can not fully be solidified.May produce the problem of solidifying defective thus.In addition, this situation also has another problem, if promptly after finishing the exposure solidification process, immediately another recording medium directly is superimposed upon on the printing image, also there is not abundant part of solidifying can transfer to down the back side of method, recording medium in the ink lay, produce the set-off phenomenon thus.
Generally speaking, be that if its image density (OD value) is 1.5 or more, printed matter just is considered to have qualified density feature under the situation of printing with ink-jet recording apparatus at printed matter.In order to realize this point, the pigment mass that just requires to add in the printing ink is almost qualified.Yet, although light-cured type printing ink by illumination curing, if the concentration of pigment increases in the printing ink, can make light be difficult to arrive the depths of ink lay, thereby damage the curability of ink lay.Equally, if the thickness of ink lay increases, the curability of this ink lay also can reduce.
Summary of the invention
Therefore, one of purpose of the present invention provides a kind of exposure solidification method of light-cured type printing ink, and this printing ink can evenly solidify and can not cause the incomplete curing of ink lay at the surf zone of ink lay and interior zone.
In addition, another object of the present invention provides a kind of ink-jet recording apparatus that heater block (in order to promote the curing of the ink lay that light-cured type printing ink constitutes) just can form the good printing image that need not to be equipped with in addition.
According to one aspect of the present invention, a kind of exposure solidification method of the ink lay that forms on recording medium is provided, this ink lay is made by a kind of light-cured type printing ink, this printing ink contains at least a in polymerisable solvent under the condition that has acid, a kind of light-acid forming agent and a kind of colouring agent component that generates acid can be in illumination the time, and this method comprises:
First illumination step, wherein use luminous component, can be penetrated ink lay by the illumination of light-acid forming agent absorption with wavelength with first illumination peak value, not only make light contained in the ink lay-acid forming agent generate acid thus, the temperature of ink lay is raise to reduce ink viscosity, thereby promote the diffusion of acid in ink lay, condition is that first illumination step is not exclusively solidified ink lay; With
Second illumination step, wherein use luminous component to use up the ink lay that irradiation had been handled in first illumination step with second illumination peak value, the second illumination peak value is higher than the first illumination peak value, not only make the light-acid forming agent in the ink lay further generate acid thus, the temperature of ink lay is raise to promote this acid in the diffusion of ink lay inside and the further curing of promotion ink lay.
According to a second aspect of the present invention, a kind of ink-jet recording apparatus is provided, it contains:
Ink jet print head;
Parts in order to the relative position of conversion recording medium and ink jet print head;
By light-cured type printing ink is passed on the recording medium forming the parts of ink lay from ink jet print head, light-cured type printing ink comprise at least a can be in the solvent of polymerization under the situation that has acid, a kind of light-acid forming agent and a kind of colouring agent component that generates acid can be in illumination the time;
First luminous component, can be absorbed light on the ink lay by light-acid forming agent in order to its wavelength of emission under first illumination, not only make light contained in the ink lay-acid forming agent generate acid thus, the temperature of ink lay is raise with the reduction ink viscosity, thereby can not make the diffusion of promotion acid in ink lay under the completely crued situation of ink lay;
Second luminous component is in order to be higher than the curing of launching the ink lay after light carries out illumination for the first time with promotion use first luminous component under second illumination of first illumination; With
Luminous-control assembly, in order to the first illumination peak value of controlling first luminous component so that it is lower than the second illumination peak value of second luminous component.
Can set forth other purpose of the present invention and advantage in the following description, illustrate that according to these they are conspicuous to a certain extent, perhaps can learn by putting into practice the present invention.Can realize and obtain these purposes of the present invention and advantage by means of means that hereinafter particularly point out and combination.
Description of drawings
Introduce and constitute the specification part annexed drawings set forth embodiment of the present invention, and with top general introduction and following detailed description to embodiment in order to explain principle of the present invention.
Fig. 1 is the schematic diagram of the ink-jet recording apparatus of explanation one embodiment of the invention.
Fig. 2 is the schematic diagram of the ink-jet recording apparatus of explanation another embodiment of the invention.
Fig. 3 is the schematic diagram of the ink-jet recording apparatus of explanation another embodiment of the present invention.
Fig. 4 is the figure of the time dependent example of declare record dielectric surface temperature.
Fig. 5 is the schematic diagram of the traditional ink-jet recording apparatus of explanation.
Fig. 6 is the time dependent figure of recording medium surface temperature of the traditional ink-jet recording apparatus of explanation.
Fig. 7 is the schematic diagram of the forward type ink-jet recording apparatus of explanation another embodiment of the present invention.
The specific embodiment
To explain various embodiments of the present invention below.
In the method for embodiment of the present invention, adopted a kind of contain at least a can be at the solvent of polymerization under the situation that has acid, a kind of light-acid forming agent of acid and a kind of light-cured type printing ink of colouring agent component of generating can be in illumination the time.The ability that this printing ink forms image depends on the mechanism that this printing ink strengthens with chemical mode to a great extent.That is to say that at first, when printing ink is subjected to illumination, generate acid by light-acid forming agent, this acid is diffused in the ink lay owing to the heating of ink lay subsequently, thereby makes acid can be used as the catalyst of ink lay cross-linking reaction.Because this diffusion of acid, acid is penetrated in the ink lay since for example the obstruction of coloured material can't transmission enter the depths of light, so just can impel curing to spread all over a large amount of zones of ink lay.
In the printing ink that will use in the method for embodiment of the present invention, solvent that can polymerization under the situation that has acid should preferably contain at least a compound that is selected from following substances that is not less than 50 weight portions: have epoxide, vinethene compound and the oxetane compound of alicyclic skeleton and/or aliphatic skeleton, the viscosity under their each comfortable normal temperature and the normal pressure is that 50mPas or littler and boiling point are 150 ℃ or higher.When the viscosity of solvent is defined as 50mPas or more hour, printing ink can spray, thereby makes printing ink be applicable to ink mist recording from ink gun.In addition, when the boiling point of printing ink is 150 ℃ or when higher, can suppress the volatility of printing ink, thereby strengthen the stability relevant with the output of jetted ink.The boiling point of the solvent that uses should be more preferably 180 ℃ or higher.As long as can be not less than the 50wt% of solvent total amount at the content that has the solvent of polymerization under the sour situation, just can fully show above-mentioned character.The part of alicyclic skeleton and/or aliphatic skeleton can comprise oxygen atom.
Especially, solvent more preferably contains the compound of aliphatic epoxide shown in the following general formula (1) and oxygen heterocycle butane ring.
R1-CH
2-C(CH
3)
2-CH
2-R1 (1)
(in this general formula (1), R1 is a glycidol ether)
As for light-acid forming agent, can adopt for example salt, diazol, nitrine quinone (quinonediazide) compound, organohalogen compounds, aromatic sulfonic acid salt compound, two sulfones (bisulfone) compound, sulfonyl compound, sulfonate compound, sulfonium compound, sulphamide compound, iodine compound, sulfonyl diazomethane compound and their mixture.
Specifically, more preferably adopt salt.The example that can be used for the salt of this situation is diazol, phosphonium salt and sulfonium salt, and they contain fluoboric acid root anion, hexafluoroantimonic anion anion, hexafluoroarsenate root anion, TFMS root anion, p-methyl benzenesulfonic acid root anion or para-nitrotoluene azochlorosulfonate acid anion as counter ion counterionsl gegenions.
With respect to polymerisable solvent under the 100 weight portions situation that contained acid exists in printing ink, the mixing ratio of light-acid forming agent should preferably be limited to 1 to 12 weight portion in light-curable ink.If the mixing ratio of light-acid forming agent surpasses aforementioned range, will have a strong impact on dispersing of pigments or have a strong impact on the tack stability relevant with the jetted ink useful life.In addition, if add the tack stability of sensitizer with further enhancing dispersing of pigments and printing ink in printing ink, so with respect to 100 parts by weight solvent, the mixing ratio of light-acid forming agent should preferably be limited to 1 to 10 weight portion in the printing ink.
As for the colouring agent component that in light-curable ink, adds, can use pigment absorption.The object lesson of this pigment absorption comprises carbonaceous pigments, for example carbon black, carbonrefined and CNT; Metal oxide pigment, for example iron black, cobalt blue, zinc oxide, titanium oxide, chromium oxide and iron oxide; Sulfide pigment, for example zinc sulphide; Phthalocyanine color; The pigment that forms by salt such as metal sulfate, metal carbonate, metal silicate and metal phosphate; With the pigment that forms by metal dust such as aluminium powder, bronze powder and zinc powder.
With respect to 100 parts by weight solvent, the content of colouring agent component should preferably be defined as 1 to 25 weight portion in the solvent, more preferably 3 to 6 weight portions.If the content of colouring agent component is lower than 1 weight portion, just be difficult to obtain qualified color density.On the other hand, surpass 25 weight portions, will reduce the conveying capacity of printing ink if the content of colouring agent component rises to.As long as with respect to 100 parts by weight solvent, the content of pigment is at least 3 weight portions, just can obtain up to 1.5 or above high relatively image density (OD value).Above-mentioned these pigment (and dyestuff) can use separately or two or more are used in combination, to strengthen absorbance, colourity and color vision (color vision).
In the printing ink content of powdered components should preferably be defined as account for quantity of ink 1 to 50wt%.If the content of powdered components is lower than 1wt% in the printing ink, just can not fully obtain to strengthen the effect of printing ink light sensitivity.On the other hand, if the content of powdered components is higher than 50wt% in the printing ink, will reduce the resolving power and the light sensitivity of printing ink.
As for the colouring agent component of using in the jetted ink or the average grain diameter of powdered components, it should be as far as possible little, only otherwise can have a strong impact on the conveying of jetted ink and representing of these component required functions.Generally speaking, the average grain diameter of colouring agent component or powdered components should be defined as in order to the nozzle bore that sprays recording jetted ink 1/3 or lower, more preferably about 1/10.Simultaneously, the aperture of nozzle typically is 10 microns or littler, more preferably 5 microns or littler.Therefore, the preferable particle size of colouring agent component or powdered components should be limited to 0.3 micron or littler, and its average grain diameter typically is limited to 0.05 to 0.2 micron.
The light-cured type printing ink that adopts in the method for embodiment of the present invention can obtain by following method: will be scheduled to component and evenly mix, for example using then, the PTFE filter filters.
In order to stablize output or ejection printing ink from ink gun, printing ink should preferably have the viscosity in the preset range.For example, ink viscosity should be controlled to be at 25 ℃ and be 50mPasec or lower, is 30mPasec or lower at 25 ℃ more preferably.
Next, explain ink-jet recording apparatus with reference to the accompanying drawings according to one embodiment of the invention.
Fig. 1 is the schematic diagram of the ink-jet recording apparatus of explanation one embodiment of the invention.Ink-jet recording apparatus shown in it 1 is equipped with a transfer member (conveyer) 3 in order to transmit recording medium 2.Along the rotation direction of transfer member 3, beginning downstream from upstream side, side disposes inkjet type record head 4 and luminous component (light source) 5 successively.This luminous component 5 comprises the first luminous component 5a and the second luminous component 5b that settles in regular turn.
Aspect recording medium (promptly to its goods that print) 2, to its kind without any specific restriction, as long as can on this recording medium 2, print.That is to say, can adopt various materials, comprise paper, timber, OHP sheet, resin molding, nonwoven, perforated membrane, plastic sheet, circuit board and metal substrate as recording medium 2.
The structure of transfer member 3 makes recording medium 2 can pass through the front side of record head 4 and luminous component 5 in regular turn.In this example, transfer member 3 is sent to the left side with recording medium 2 from the right side of figure.This transfer member 3 can be by constituting in order to for example conveyer belt that transmits recording medium 2 and/or roller with in order to the drive mechanism that drives this conveyer belt and/or roller.In addition, this transfer member 3 can also be furnished with a director element that transmits in order to auxiliary recording medium 2.In addition, this transfer member 3 can also be made of to transmit the recording medium 2 of sheet external form the platform structure (stagestructure) that can slide on the straight line base.
Configuration record head 4 forms ink lay thus so that according to picture signal light-cured type printing ink is transported on the recording medium 2.
The ink lay that forms on 5 pairs of recording mediums 2 of luminous component carries out illumination, makes the curing that can generate acid in the ink lay and further promote ink lay by the effect of acid thus.As for luminous component 5, can adopt mercury lamp, for example low pressure, medium-pressure or high pressure mercury lamp; Between halide lamp; Electrodeless halide lamp; Tungsten lamp; Xenon lamp; Arc lamp; Excimer lamp (excimer lamp); Excimer laser (excimer laser); Semiconductor laser; The YAG laser instrument; The Optical Maser System that constitutes by laser instrument and nonlinear optical crystal; The high-frequency induction ultraviolet ray generating apparatus; Electron beam launcher; X-ray emission device etc.Wherein, high-frequency induction ultraviolet ray generating apparatus, high/low pressure mercury lamp and semiconductor laser are preferred, because these devices help simplifying system for use in carrying.If adopt ultraviolet ray, ultraviolet wavelength should preferably be limited to 100 nanometer to 600 nanometers.More preferably, consistent with the wavelength photoreceptor of contained light-acid forming agent in the light-cured type printing ink although light wavelength requires, luminous component 5 should preferably have the illumination peak value of about 250 nanometers or 365 nanometers.Luminous component 5 can be furnished with convergent mirror or scan-type optical system.
The light wavelength of sending from luminous component 5 is not limited to ultraviolet ray, but can randomly be selected from the light of the wavelength photoreceptor with light-acid forming agent contained in the light-cured type printing ink.
Comprise first luminous component 5a with first illumination peak value and the second luminous component 5b according to the luminous component 5 in the ink-jet recording apparatus 1 of one embodiment of the invention with second illumination peak value.In this example, the first illumination peak value should preferably be lower than the second illumination peak value.
Use these two luminous components to carry out when luminous, it is indefinite that the surface temperature of recording medium 2 rises and falls, for example, and as shown in Figure 4.Fig. 4 has illustrated the time dependent example of surface temperature according to recording medium 2 in the ink-jet recording apparatus 1 of one embodiment of the invention.
Not only realized luminously by the first luminous component 5a and the second luminous component 5b, also realized heat release.Identical mode when luminous has also applied heat to the ink lay on the recording medium 2, and its figure has peak value, as shown in Figure 4.When the position of first thermal peak and second thermal peak is closer to each other, also be not cooled to carry out under the condition of initial temperature second luminous in the ink lay temperature.Can strengthen the diffusion effect of the acid of generation like this, promote photocuring reaction thus better.
By using aforementioned ink-jet recording apparatus 1, can on recording medium 2, carry out reliable image printing by following method.
At first, by transfer member 3, recording medium 2 is sent to the left side from the right side of figure.The transfer rate of recording medium 2 can earmark according to it and select arbitrarily, although transfer rate also is subjected to the restriction of printing density and driving frequency.For example, the transfer rate with recording medium 2 is controlled in about 10 meters/minute.
When recording medium 2 is sent to one position, record head 4 the place aheads, from record head 4, export light-cured type printing ink according to picture signal.Thus, on recording medium 2, form the appointment ink lay.
Then, as described below the recording medium 2 that has ink lay is carried out illumination.That is to say that as mentioned above, the light that uses in the irradiation requires consistent with the wavelength photoreceptor of contained light-acid forming agent in the light-cured type printing ink.For example, can use the illumination peak value is the ultraviolet ray of about 250 nanometers or 365 nanometers.
The recording medium 2 that ink lay is arranged on it is sent to one position, the place ahead of the first luminous component 5a.When recording medium 2 passes through one position, first luminous component 5a the place ahead, luminous with the ink lay of the first illumination peak value on recording medium 2 from the first luminous component 5a.Because illumination for the first time, acid generates and diffuses into ink lay.In this case, should carry out the curing in ink lay (especially, the zone of ink lay near surface) in the mode that can not realize its curing fully.In order to realize this point, the first illumination peak value of the first luminous component 5a should preferably be limited to about 200mW/cm
2To 2000mW/cm
2If the first illumination peak value of the first luminous component 5a is lower than 200mW/cm
2, just be difficult to fully generate acid and make it diffuse into ink lay.On the other hand, if the first illumination peak value of the first luminous component 5a surpasses 2000mW/cm
2, have only ink lay (especially, the zone of ink lay surface annex) to be cured.
The recording medium 2 that will have ink lay (the effect by the illumination first time of containing in this ink lay is diffused into acid wherein) then is transported to the place ahead of the second luminous component 5b.When recording medium 2 passes through a position in second luminous component 5b the place ahead, luminous with the second illumination peak value from the second luminous component 5b to the ink lay that recording medium 2 forms.Because illumination has for the second time promoted the curing of ink lay.In order to realize this point, the second illumination peak value of the second luminous component 5b should preferably be limited to about 1000mW/cm
2To 3000mW/cm
2If the second illumination peak value of the second luminous component 5b is lower than 1000mW/cm
2, just be difficult to fully provide the curing of ink lay.On the other hand, if the second illumination peak value of the second luminous component 5b surpasses 3000mW/cm
2, recording medium 2 may be out of shape or printing ink in component can be destroyed.
The ultraviolet total amount of sending separately during first and second irradiations should preferably be limited to about 150mJ/cm
2To 400mJ/cm
2If the ultraviolet total amount of sending is lower than 150mJ/cm
2, the generation of acid and diffusion all can become insufficient in the ink lay, are difficult to fully promote the curing of printing ink thus.On the other hand, if the ultraviolet total amount of sending surpasses 400mJ/cm
2, will produce such as variety of issues such as components in the destruction printing ink.
As for the heat that sends with light, the temperature peak of the recording medium 2 that first heat produces should preferably be limited to about 30 ℃ to 50 ℃, and the temperature peak of the recording medium 2 that is produced by second heat should preferably be limited to about 40 ℃ to about 60 ℃.
Because it is very little that the volume of the ink lay that forms on recording medium 2 is compared with the volume of recording medium 2, the temperature of ink lay can become with the surface temperature of recording medium 2 much at one.
Just should be preferably than at least 10 ℃ of its initial temperature height by the surface temperature of recording medium 2 behind the second luminous component 5b.At this, initial temperature is meant the temperature of recording medium 2 before the above-mentioned illumination first time.If can the surface temperature of recording medium 2 be increased by 10 ℃ or more by illumination for the second time, the acid that generates because of the illumination of the first luminous component 5a in the ink lay just can be spread the generation of the acid that this step simultaneous second luminous component 5b causes reliably in the step that the second luminous component 5b shines.
Although it can be different according to the transfer rate of second recording medium 2,, just can not after the illumination second time, make the surface temperature peak value of recording medium 2 reach temperature required if the relative distance between the first luminous component 5a and the second luminous component 5b is excessive.Its reason is the following fact: with illumination (herein, for example ultraviolet ray) the illumination contrast that produces, the temperature peak on recording medium 2 surfaces that caused by the heat that sends among the second luminous component 5b require to be accumulated on the surface temperature peak value of the recording medium 2 that the heat that sent by the first luminous component 5a causes.
Therefore, again reduce to original temperature before the illumination for the second time for the surface temperature that prevents recording medium 2 after the illumination first time, the time gap between the first luminous component 5a and the second luminous component 5b should preferably be adjusted to approaching as far as possible.
Under the situation of light-cured type printing ink, printing ink is subjected to illumination time-acid forming agent and generates acid, and this acid because the heating of ink lay is diffused in the ink lay, makes the acid can be as the catalyst of ink lay cross-linking reaction or decomposition reaction subsequently thus.Because this diffusion of acid, can make acid now in addition be penetrated in the ink lay since for example the obstruction of coloured material can't transmission enter the depths of light, so just can promote that under the situation that has acid ink lay solidify on a large scale, slow although curing reaction is had a few.
Yet, because curing reaction is very slow basically, just have a problem in this case: after finishing exposure-solidification process immediately on the printing image directly during another recording medium of stack, will below the back side generation set-off phenomenon of recording medium.Yet in aforesaid method according to one embodiment of the invention, at first the acid that generates capacity by light contained in the ink lay-acid forming agent is to realize curing to a certain degree, and simultaneously, acid is spread in ink lay.After this, with higher illumination value ink lay is carried out illumination, further generate acid by light-acid forming agent by the second luminous component 5b, simultaneously owing to the heat that at this moment sends, further diffusion everywhere in ink lay of acid.Therefore, can promote effectively that the ink lay on the recording medium solidifies, can solve foregoing problems thus.
Can control as described below ink-jet recording apparatus 1 according to one embodiment of the invention shown in Figure 1.Simultaneously, Fig. 2 is the flow chart of expression according to the control system of the ink-jet recording apparatus of one embodiment of the invention.
Ink-jet recording apparatus 1 comprises transfer member 3, ink jet print head 4, the first luminous component 5a and the second luminous component 5b as primary clustering, and they are designed to drive by the control of microprocessor separately substantially.Therefore, ink-jet recording apparatus 1 is furnished with the CPU as microprocessor, ROM that also being furnished with all links to each other with cpu bus constitutes microcomputer and RAM (all not indicating).Control and drive aforementioned primary clustering according to the operation sequence that stores among ROM or the RAM.According to the driving control fixed, following running transfer member 3, ink jet print head 4, the first luminous component 5a and the second luminous component 5b with operation sequence.
At first, send printed data to recording controller 201, send printed data to printed data-transfer circuit 202 by it.Then, to print the driving signal and send to drive circuit of record-header 203, it drives ink jet print head 4 in the mode that light-cured type printing ink is exported from nozzle (indicating) according to the printed data that sends on printed data-transfer circuit 202 with little ink droplets subsequently.
At this moment, by recording controller 201, drive signal and also be sent to transfer member control section 204 and luminous component control section 205.Therefore, start live-roller, transmit recording medium 2 thus with drive transmission part 3.At this moment, connect the bulb of the first luminous component 5a and the second luminous component 5b.Simultaneously, these luminous components 5a and 5b are furnished with a convergent mirror respectively so that the light that will penetrate is focused near the position of ink lay.
Because selectivity is exported from ink jet print head 4 (its nozzle (indicating) forms a line along main scanning direction) combines for the translatory movement of recording medium 2 on inferior scanning direction and printing ink, can form image on recording medium 2 according to printing signal.The image of Xing Chenging (being ink lay) is sent on the position at the first luminous component 5a and the second luminous component 5b place subsequently thus, and is subjected to the irradiation of the light that the bulb of these luminous components sends, thus the fixing image on the recording medium 2.
In this case, according to this embodiment of the present invention, the radiation output quantity that realizes respectively by the luminous component control section 205 control first luminous component 5a and the second luminous component 5b is so that make printing process and exposure/condition of cure optimization when adopting ink-jet recording apparatus 1.
In ink-jet recording apparatus shown in Figure 11, operate in recording medium 2 at the ink mist recording that carries out on each recording medium 2 and finish after by the second luminous component 5b.In some cases, recording medium 2 can be sent to as shown in Figure 3 and store up in the device (stocker) 7.Store up device 7 and can be furnished with of the curing of a firing equipment with further promotion ink lay.When a plurality of recording mediums 2 pile up mutually in this way and heat jointly in batches, can obtain the ink-jet recording apparatus of cured printing ink layer fast.
Perhaps, the ink-jet recording apparatus 1 of this embodiment of the present invention can be made of platform-type ink-jet recording apparatus.Schematically illustrate an embodiment of this device among Fig. 7.In this ink-jet recording apparatus therein, recording medium 2 is fixed on the original place, and ink jet print head 4 and luminous component 5 move to form image with respect to recording medium 2.
This ink-jet recording apparatus 1 is furnished with ink jet print head 4, the first luminous component 5a and the second luminous component 5b as the ink mist recording sub-assembly.In this case, ink jet print head 4 moves back and forth continuously to carry out the image record on the recording medium 2 that is fixed on recording medium-fixed station (not indicating).
This ink mist recording sub-assembly is fixed into a sleeve assembly by a pair of guide rod 8 and 9 that is positioned at the relative both sides of this ink mist recording sub-assembly, and is arranged on a pair of preceding and rear rail of laying 10 and 11 parallel to each other and can moves back and forth with white arrow and the direction of scheming shown in the black arrow.As for the method for mobile ink mist recording sub-assembly, can adopt with tension and be connected to wire on stepping motor etc., thereby the ink mist recording sub-assembly can be spurred by wire.Perhaps, can use the linear slide device that the ink mist recording sub-assembly is moved voluntarily.
Before and rear rail 10 and 11 parallel to each other fixing and be designed to move with the direction of arrow along an a pair of left side of laying parallel to each other and right guide rail 12 and 13, guide rail 12 and 13 is positioned at the relative both sides of recording medium 2.
Use when the ink-jet recording apparatus of structure carries out ink mist recording as mentioned above, the ink mist recording sub-assembly transmits with the white direction of arrow shown in scheming, and forms image during this period on recording medium 2.After in this one-way transmission process of ink mist recording sub-assembly, finishing image and forming, the ink mist recording sub-assembly moves with the direction of arrow along a left side of laying parallel to each other and right guide rail 12 and 13, ink mist recording sub-assembly side direction is transferred to the part that is not recorded of recording medium thus in the process that the ink mist recording sub-assembly oppositely moves with direction shown in the black arrow.Then,, the ink mist recording sub-assembly is transmitted with the direction of white arrow, on recording medium 2, form image therebetween at this in identical as mentioned above mode.Repeat these operations, can on big recording medium 2, form image thus.
Can carry out basic driver to above-mentioned each assembly by the control of microprocessor.Therefore, ink-jet recording apparatus 1 is furnished with the CPU as microprocessor, ROM that also being furnished with all links to each other with cpu bus constitutes microcomputer and RAM (all not indicating).Control these assemblies respectively according to the operation sequence that stores among ROM or the RAM.According to the driving control fixed, the transmission of following operation ink jet print head 4, the first luminous component 5a, the second luminous component 5b and ink mist recording sub-assembly with operation sequence.
Explain the operation of ink-jet recording apparatus shown in Figure 7 with reference to flow chart shown in Figure 2.At first, send printed data to recording controller 201, send printed data to printed data-transfer circuit 202 by it.Then, to print the driving signal and send to drive circuit of record-header 203, it drives ink jet print head 4 in the mode that light-cured type printing ink is exported from nozzle (indicating) according to the printed data that sends on printed data-transfer circuit 202 with little ink droplets subsequently.
At this moment, by recording controller 201, drive signal and also be sent to transfer member control section 204 and luminous component control section 205.In this example, the transfer operation of transfer member control section 204 control ink mist recording sub-assemblies.
By above-mentioned control operation, drive engine or linear slide device with mobile transfer member 3 and owing to engine or linear slide device drive and transmit the ink mist recording sub-assembly.In this example, operation transfer member 3 is so that transmit the ink mist recording sub-assembly with its main scanning direction and time scanning direction.
Here, the main scanning direction of ink mist recording sub-assembly is meant the direction of the white arrow shown in the figure and the direction of black arrow.On the other hand, here, the inferior scanning direction of ink mist recording sub-assembly is meant the direction of arrow shown in the figure.When scanning, connect the bulb of the first luminous component 5a and the second luminous component 5b.These luminous components 5a and 5b are furnished with a convergent mirror respectively so that the light that will penetrate is focused on the position of ink lay annex.
The printing of ink jet print head 4 and ink mist recording sub-assembly carry out with moving of arrow or inferior scanning direction simultaneously with the transmission and the ink mist recording sub-assembly of the white arrow and the black direction of arrow.
Because selectivity is exported from ink jet print head 4 (its nozzle (indicating) forms a line along main scanning direction) combines for the translatory movement of recording medium 2 on inferior scanning direction and printing ink, can form image on recording medium 2 according to printing signal.The ink jet print head 4 of the image of Xing Chenging (being ink lay) in the ink mist recording sub-assembly located thus, be subjected to all the first luminous component 5a that moves simultaneously with ink jet print head 4 and the bulb irradiation of the second luminous component 5b subsequently, thus the fixing image on the recording medium 2.
According to this embodiment of the present invention, the radiation output quantity that realizes respectively by the luminous component control section 205 control first luminous component 5a and the second luminous component 5b is so that make printing process and exposure/condition of cure optimization when adopting ink-jet recording apparatus 1.
In the method for this embodiment of the present invention, after by first luminous component with less illumination peak value ink lay being applied illumination for the first time (light comprises the wavelength that can be absorbed by light-acid forming agent), the ink lay that obtains further is subjected to having the illumination second time of second luminous component of big illumination peak value.Because illumination for the first time, the light in the ink lay-acid forming agent generates acid, and simultaneously, because ink temperature rises, the viscosity of printing ink reduces, and can make acid diffusion equably in ink lay thus.In the illumination first time, ink lay keeps incomplete solid state.In ink lay, exist under the condition of acid, ink lay is applied the illumination second time with big illumination peak value.Thus, contained light-acid forming agent further generates acid in the ink lay.Simultaneously, make ink lay surface portion and ink lay inside evenly to solidify because of the raise diffusion of the acid improve of ink temperature.
As mentioned above, according to the method for representing one embodiment of the invention,, also can obtain a kind of surface cure (tack-free) printed matter that does not print set-off after its printing even many printed mediums are stacked immediately.
Next, explain embodiment of the present invention in detail with reference to specific embodiment.
Prepare a kind of light-cured type printing ink to check its curing performance.In the printing ink preparation, the compound Ox1 of the oxygen heterocycle butane ring shown in aliphatic epoxide Ep1 shown in the following chemical formula and the following chemical formula is mixed mutually with the ratio of 1: 1 (weight ratio), obtain a kind of acid-polymerisable compound (epoxy composite) " a ".Simultaneously, compd E p1 is a SR-NPG (neopentylglycol diglycidyl ether; Sakamoto Yakuhin Kogyo Co., Ltd.), and compound Ox1 is DOX (abbreviation)=OXT-221 (two [1-ethyl (3-oxetanyl)] methyl ether; ToagoseiChemical Industry Co., Ltd.).
Using charcoal blacks to make colouring agent also kneads with acrylic resin in advance.Then the kneading material is mixed with epoxy composite, wherein the content of charcoal blacks is the 4wt% of epoxy composite " a ".In the mixture that makes thus, (Sumitomo 3MCo. Ltd.) and by the coating shaking machine carries out dispersion treatment a whole day whole night, obtains carbon composition " a (B) " to add the 200ppm non-ionic surface active agent.
Then this carbon composition " a (B) " is mixed with light-acid forming agent PAG3 with preparation photosensitive ink 1.PAG3 as light-acid forming agent is the propylene carbonate solution that contains 1: 1 mixture of Compound P AG1 shown in the following chemical formula and PAG2 with the concentration of 50wt%.In addition, PAG3 is the propylene carbonate solution that contains the 50wt% sulfonium salt, and can buy, its trade mark be ESACURE1064 (Lanbelty Co., Ltd.).This PAG3 adds in the epoxy composite " a " with the ratio of 7.5wt%.
In photosensitive ink 1, further add the compound S 1 shown in the following chemical formula as sensitizer, and use 5 microns PTFE filters to filter the mixture that makes, obtain light-cured type printing ink 2.Compound S 1 used herein is ANTHRACURE UVS-1331 (Kawasaki KaseiChemicals Ltd.), and adds in the printing ink with the ratio of the 35wt% of liquid light-acid forming agent (PAG3).
Use ink-jet recording apparatus 1 shown in Figure 1, print to check its curing performance by using light-cured type printing ink 2.Following each assembly of preparing ink-jet recording apparatus 1 respectively.For transfer member 3, use excellent heat resistance and the low metal of thermal capacitance not to have the seam endless belt, and it is placed between live-roller and the driven voller with tensioning state.For recording medium 2, use OHP sheet (V516 (trade mark) (100 micron thickness PET sheet); Fuji Zerox Co., Ltd.).
For record head 4, use ink jet print head CB1 (trade mark; Toshiba TEC Co., Ltd.).For luminous component 5, use a pair of UV radiating system LH-6 (D bulb: wavelength peak=350 nanometers-390 nanometer, standard mirror; Fusion UV Systems Japan Co., Ltd.).The change illumination and the first luminous component 5a and the second luminous component 5b total amount of light separately carry out illumination.Herein, the distance between the first luminous component 5a and the second luminous component 5b is about 500 millimeters, this distance variable.
Light-cured type printing ink is sprayed onto on the recording medium 2 forming ink lay from record head 4, and it is solidified into thickness subsequently is 5 to 6 microns curing ink film.
Printing condition (forming the condition of solidifying ink film) is as follows:
The definition of record head 4: 300dpi;
Each nozzle of output quantity of ink: 42pL/;
Print speed printing speed (being used as the rate travel of the conveyer belt of recording medium transfer member);
Illumination (ultraviolet ray): 150mW/cm
2-3000mW/cm
2
Light total amount (ultraviolet ray): 100mJ/cm
2-500mJ/cm
2
The radiation output quantity of luminous component 5 (ultraviolet illumination/light total amount) is to use ultraviolet dosimeter (the industrial UV verifier of Topcon Corporation; UVR-T1, photometry part: UD-T36; Wavelength photoreceptor peak value: the about 350 nanometers) value that records.In addition, use the output quantity of aforementioned UV radiating system to regulate thumbscrew is regulated illumination in the scope of 25-100% output quantity.By the control to the first luminous component 5a and the second luminous component 5b, the illumination peak value of illumination has different combinations, forms various curing ink films thus.
Measure the temperature of the recording medium 2 of transmission indirectly by being attached to thermocouple on the recording medium surface, obtain recording medium thus after the illumination first time and the temperature after the illumination for the second time.
The curing ink film of making uses cleansing tissue (Chymwipe respectively; Cresia Co., Ltd.) friction several is to check the surface cure of this film.Surface cure herein is meant that when many light-cured type printing ink is transferred to the possibility at the back side that is superimposed upon the recording medium 2 on another recording medium 2 when being printed on printing record images medium 2 separately and piling up mutually.Therefore, many when being printed on printing record images medium 2 separately and piling up mutually even surface cure is meant, the photo-curable printing ink that also not have discovery to form on a recording medium 2 end faces is fully transferred to the back side of the recording medium 2 above it.
Zero: surface cure (, also not wiping printing ink) even use Chymwipe will solidify ink film friction five times
△: surface cure to a certain degree (rub five times the time when using Chymwipe will solidify ink film, ink adhesion is arranged to Chymwipe)
*: (ink film is solidified in usefulness Chymwipe friction to no surface cure, and printing ink just adheres on the Chymwipe; Be insufficient curing)
If ink film is a surface cure, just can determine that the ink film on the recording medium 2 solidifies fully fully.
To illumination peak value (mW/cm by change first and second luminous components
2) result of surface cure measurement of the curing ink film that obtains is summarised in the following table 1 with the illumination total amount.
Table 1
| The UV radiation | Radiation for the second time | ||||||||
| Illumination (mW/cm 2) | 263 | 572 | 881 | 1191 | 1500 | 1810 | 2119 | 2429 | |
| Radiation for the first time | 160 | - 5 | - 38 | - 71 | × 105 | × 138 | - 171 | - 204 | - 237 |
| 263 | - 8 | - 41 | × 74 | × 108 | △ 141 | ○ 174 | ○ 207 | ○ 240 | |
| 572 | - 41 | × 74 | △ 107 | △ 141 | ○ 174 | ○ 207 | ○ 240 | ○ 273 | |
| 881 | × 74 | × 107 | △ 140 | ○ 174 | ○ 207 | ○ 240 | ○ 273 | ○ 306 | |
| 1191 | △ 108 | △ 141 | △ 174 | △ 208 | ○ 241 | ○ 274 | ○ 307 | ○ 340 | |
| 1500 | △ 141 | △ 174 | △ 207 | △ 241 | △ 274 | ○ 307 | ○ 340 | ○ 373 | |
| 1810 | × 174 | △ 207 | △ 240 | △ 274 | △ 307 | △ 340 | ○ 373 | △ 406 | |
| 2119 | - 207 | - 240 | △ 273 | △ 307 | △ 340 | △ 373 | △ 406 | × 439 | |
| 2429 | - 240 | - 273 | × 306 | × 340 | × 373 | × 406 | × 439 | △ 472 | |
At these exposure conditions of cure, promptly under the illumination condition, when the output quantity (being illumination) of the illumination second time rises to when being higher than illumination for the first time the surface cure raising of solidifying ink film.In other words, these ink films can present surface cure immediately after its printing.Therefore, in embodiments of the invention, the illumination peak value of second luminous component is higher than first luminous component.
Find out that from the result of table 1 illumination of the first luminous component 5a should preferably be limited to 200mW/cm
2To 2000mW/cm
2, and the illumination of the second luminous component 5b should preferably be limited to 100mW/cm
2To 3000mW/cm
2In addition, the illumination total amount of the first luminous component 5a and the second luminous component 5b preferably is limited to 150mJ/cm
2To 400mJ/cm
2
Simultaneously, at the very start the ink lay surface is produced high radiation if the illumination of the first luminous component 5a is higher, the surface portion of ink lay will shift to an earlier date abundant curing so.Therefore, even the ink lay surface is fully shone, light still can not reach the depths of ink lay again, can not fully produce acid thus.In addition, even there is the acid of capacity in the ink lay, because the curing of ink lay surface portion, acid also can not fully be spread in whole ink lay, causes insufficient curing of ink lay depths thus.Therefore, must make the illumination peak value of the first luminous component 5a be lower than the illumination peak value of the second luminous component 5b.
The peak value of the surface temperature of recording medium 2 when following table 2 has been listed illumination.In this case, the illumination that changes the first luminous component 5a and the second luminous component 5b by different way by the method identical with table 1 makes up and makes them carry out illumination, and by being attached to the temperature of the indirect surveying record medium 2 of recording medium 2 lip-deep thermocouples, measurement result is summarised in the following table 2.
Table 2
| The UV radiation | Radiation for the second time | ||||||||
| Illumination (mW/cm 2) | 263 | 572 | 881 | 1191 | 1500 | 1810 | 2119 | 2429 | |
| Radiation for the first time | 160 | 30 30 | 30 31 | 30 32 | 30 35 | 30 36 | 30 40 | 30 41 | 30 42 |
| 263 | 32 32 | 32 33 | 32 34 | 32 37 | 32 40 | 32 42 | 32 43 | 32 44 | |
| 572 | 35 35 | 35 37 | 35 38 | 35 40 | 35 43 | 35 45 | 35 46 | 35 48 | |
| 881 | 38 38 | 38 39 | 38 43 | 38 44 | 38 46 | 38 48 | 38 49 | 38 50 | |
| 1191 | 41 41 | 41 42 | 41 44 | 41 46 | 41 49 | 41 51 | 41 53 | 41 55 | |
| 1500 | 45 45 | 45 46 | 45 47 | 45 49 | 45 51 | 45 55 | 45 56 | 45 57 | |
| 1810 | 48 48 | 48 48 | 48 49 | 48 52 | 48 53 | 48 55 | 48 56 | 48 60 | |
| 2119 | 52 52 | 52 53 | 52 53 | 52 54 | 52 56 | 52 57 | 52 59 | 52 61 | |
| 2429 | 54 54 | 54 55 | 54 57 | 54 58 | 54 59 | 54 61 | 54 62 | 54 63 | |
In last table 2, the peak value of recording medium 2 surface temperatures when up numeric representation recording medium 2 passes through the first luminous component 5a, the peak value of recording medium 2 surface temperatures when descending numeric representation recording medium 2 passes through the second luminous component 5b.Simultaneously, recording medium 2 is 30 ℃ at it by the initial temperature before the first luminous component 5a.
Can find out obviously that from the comparison of table 2 and above-mentioned table 1 if carry out illumination under the condition of the surface cure that becomes immediately after the ink lay printing, the surface temperature of recording medium raises 10 ℃ or more than its initial temperature basically after the illumination for the second time.
That sends from luminous component 5 is not only light, also heating simultaneously.That is to say, initial temperature before the surface temperature of recording medium 2 is passed through the first luminous component 5a than recording medium 2 at least is (in this example, for example 30 ℃) when high, carry out illumination by the second luminous component 5b, just can make recording medium 2 obtain the surface temperature characteristic of recording medium as shown in Figure 4.Thus, can be effectively from ink lay, generate acid in contained light-acid forming agent, can also carry out the diffusion of acid in ink lay effectively, can promote the curing of printing ink thus.
As for the luminous component liberated heat, its first peak value should be preferably as far as possible near its second peak value.Do like this under the condition that can also not have in the temperature of ink lay fully to reduce and carry out the illumination second time.Thus, can effectively promote the diffusion of the acid that generated, promote the photocuring reaction of ink lay thus.
Next, explain the time dependent example of surface temperature of recording medium 2 in according to the operation of the ink-jet recording apparatus 1 of one embodiment of the invention with reference to Fig. 4.The transfer rate of transfer member 3 is set at 25 meters/minute, and the first luminous component 5a is positioned at and the original position (time: 0) be separated by 300 millimeters place.In addition, the second luminous component 5b is positioned at be separated by 500 millimeters the place with the first luminous component 5a.The illumination peak value of the first luminous component 5a is set at about 1500mW/cm
2, and the illumination peak value of the second luminous component 5b is set at about 1810mW/cm
2The illumination total amount is about 307mJ/cm
2Recording medium its during by the first luminous component 5a and the second luminous component 5b surface temperature fluctuate as shown in Figure 4.
Recording medium surface temperature characteristic in traditional ink-jet recording apparatus operation as shown in Figure 6.More specifically, surface temperature characteristic shown in Figure 6 is available from traditional ink-jet recording apparatus shown in Figure 5.By being attached to the temperature of the indirect surveying record medium 2 of recording medium 2 lip-deep thermocouples.The make of ink-jet recording apparatus shown in Figure 5 and tape deck shown in Figure 1 are basic identical, and difference only is not to be equipped with the second luminous component 5b.
From relatively finding out of Fig. 4 and Fig. 6, when tape deck is equipped with a pair of luminous component, can increase the illumination energy (irradiation total amount) of granting light-cured type printing ink, can also progressively increase heat energy.
In addition, also measured the hardness of the printing image that forms on the recording medium 2.The hardness measurement of printing image is carried out according to JIS K5600-5-4 (using MITSU-BISHI pencil 2B-2H).In addition, also measure the printing image and transferred the hardness of postpone at controlled condition.Placement condition as for the printing image is included under the sufficient condition, and normal temperature is placed 24 hours, 50 ℃ and placed 30 minutes, places 1 minute for 100 ℃.Yet, realize that optimum placement condition of solidifying is not limited to above-mentioned these conditions.That is to say, optimum placement condition can be more or less according to the kind of the composition material of light-cured type printing ink, luminous component with exposure/condition of cure (being illumination condition) and different.
The pencil hardness of every printed matter making under these conditions is summarised in the following table 3.In table 3, the pencil hardness of the ink lay of surface cure immediately after the up numeric representation in the every hurdle printing, and the descending numeric representation in every hurdle is placed on the pencil hardness of the ink lay under the controlled condition.If the pencil hardness of ink lay is higher than " F ", can conclude that ink lay has enough hardness as printed matter.
Table 3
| The UV radiation | Radiation for the second time | ||||||||
| Illumination (mW/cm 2) | 263 | 572 | 881 | 1191 | 1500 | 1810 | 2119 | 2429 | |
| Radiation for the first time | 160 | ||||||||
| 263 | B F | B F | |||||||
| 572 | B F | HB F | HB F | ||||||
| 881 | B F | B F | B F | HB F | HB F | ||||
| 1191 | B F | HB F | HB F | HB F | |||||
| 1500 | HB F | HB F | HB F | ||||||
| 1810 | HB F | ||||||||
| 2119 | |||||||||
| 2429 | |||||||||
Even ink lay is surface cure immediately after mark " zero " printing that is shown in the table 1 as above, its pencil hardness also only is approximately " B " or " HB ".The hardness of this degree can't be used as printed matter satisfactorily.By these printed matters are placed under the predetermined condition, the curing that can further improve light-cured type printing ink is to obtain the ink lay of final pencil hardness for " F ".
As mentioned above, even the printed matter of surface cure also can prevent to produce set-off when many printed matters are stacked, can also be by for example placing the final pencil hardness that obtained " F " at least in 24 hours in 25 ℃ the environment.In addition, by using ink-jet recording apparatus shown in Figure 3, can leave in and store up in the device 7 finishing recording medium printed.When in storing up device 7 the printing product being criticized heat treated, can make final pencil hardness in the shorter time is the printed matter of " F ".
The method of the application of the invention embodiment, can generate acid effectively and make it be diffused into thickness is 12 microns or lower, more preferably in 7 microns or the lower ink lay.Thus, can obtain on image density (OD value), to present the printed matter of 1.5 higher density.
As mentioned above, according to the present invention, can provide a kind of exposure-solidification method of light-cured type printing ink, it is the surf zone and the interior zone of cured printing ink layer equably, and can not cause the incomplete curing of ink lay.In addition, according to the present invention, can provide a kind of ink-jet recording apparatus, it need not to be equipped with in addition the printing image that the heater block that solidifies in order to the ink lay that promotes light-cured type printing ink to constitute just can form high-quality.
Readily understand other advantage and change method for those skilled in the art.Therefore, shown in the present invention is not limited to here aspect wider and described detail and typical embodiments.Therefore, can under the situation of the spirit or scope of the total inventive concept that does not deviate from claims and defined, make various changes.
Claims (7)
1. exposure-the solidification method of an ink lay that on recording medium, forms, described ink lay is made by light-cured type printing ink, this printing ink contains at least a in polymerisable solvent under the condition that has acid, a kind of light-acid forming agent and a kind of colouring agent component that generates acid can be in illumination the time, it is characterized in that comprising:
First illumination step, wherein use luminous component, can be penetrated ink lay by the illumination of light-acid forming agent absorption with wavelength with first illumination peak value, not only make light contained in the ink lay-acid forming agent generate acid thus, the temperature of ink lay is raise to reduce ink viscosity, thereby promote the diffusion of acid in ink lay, condition is that first illumination step is not exclusively solidified ink lay; With
Second illumination step, wherein use luminous component to use up the ink lay that irradiation had been handled in first illumination step with second illumination peak value, the described second illumination peak value is higher than the first illumination peak value, not only make the light-acid forming agent in the ink lay further generate acid thus, the temperature of ink lay is raise to promote this acid in the diffusion of ink lay inside and the further curing of promotion ink lay.
2. according to the exposure-solidification method of claim 1, it is characterized in that second illumination step is that surface temperature at recording medium is carried out when being higher than its initial temperature before first illumination step.
3. according to the exposure-solidification method of claim 1, it is characterized in that colouring agent component contained in light-curable ink is a pigment, with respect to the solvent that 100 weight portions solidify under the condition that has acid, the content of pigment is defined as 3 to 6 weight portions.
4. according to the exposure-solidification method of claim 1, it is characterized in that polymerisable solvent under the condition that the acid in light-cured type printing ink exists contain be not less than 50 weight portions have alicyclic skeleton and/or aliphatic skeleton and also under normal temperature and normal pressure viscosity be that 50mPas or littler and boiling point are 150 ℃ or higher acid-polymerizable compound; With respect to the solvent that 100 weight portions solidify under the condition that has acid, the content of light-acid forming agent is defined as 1 to 12 weight portion.
5. according to the exposure-solidification method of claim 1, it is characterized in that polymerisable solvent comprises at least a following material that is selected under the condition that the acid in light-cured type printing ink exists: epoxide, vinethene compound and oxetane compound with alicyclic skeleton and/or aliphatic skeleton.
6. according to the exposure-solidification method of claim 1, it is characterized in that polymerisable solvent under the condition that the acid in light-cured type printing ink exists comprises the compound of aliphatic epoxide shown in the following general formula (1) and oxygen heterocycle butane ring:
R1-CH
2-C(CH
3)
2-CH
2-R1 (1)
In this general formula (1), R1 is a glycidol ether.
7. ink-jet recording apparatus is characterized in that comprising:
Ink jet print head (4);
Parts (3) in order to the relative position of conversion recording medium and ink jet print head;
Light-cured type printing ink is passed on the recording medium forming the parts of ink lay from ink jet print head, and described light-cured type printing ink comprises at least a in polymerisable solvent under the condition that has acid, a kind of light-acid forming agent and a kind of colouring agent component that generates acid can be in illumination the time;
First luminous component (5a), can be absorbed light on the ink lay by light-acid forming agent in order to its wavelength of emission under first illumination, not only make light contained in the ink lay-acid forming agent generate acid thus, the temperature of ink lay is raise with the reduction ink viscosity, thereby can not make the diffusion of promotion acid in ink lay under the completely crued situation of ink lay;
Second luminous component (5b) is in order to be higher than the curing of launching the ink lay after light carries out illumination for the first time with promotion use first luminous component under second illumination of first illumination; With
Luminous-control assembly (205), in order to the first illumination peak value of controlling first luminous component so that it is lower than the second illumination peak value of second luminous component.
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| CN 200510052916 CN1827373A (en) | 2005-02-28 | 2005-02-28 | Exposure curing method for light-curable ink and ink-jet recording device |
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|---|---|---|---|
| CN 200510052916 CN1827373A (en) | 2005-02-28 | 2005-02-28 | Exposure curing method for light-curable ink and ink-jet recording device |
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| CN102371759A (en) * | 2010-08-10 | 2012-03-14 | 富士胶片株式会社 | Add-on type ultraviolet irradiation apparatus and image forming apparatus |
| CN102765251A (en) * | 2011-05-03 | 2012-11-07 | 郑进 | Printing and duplicating equipment capable of generating duplication prevention bearing medium |
| CN103935131A (en) * | 2008-02-29 | 2014-07-23 | 株式会社御牧工程 | Inkjet printer |
| CN105939854A (en) * | 2014-01-31 | 2016-09-14 | 株式会社御牧工程 | Inkjet printing apparatus, method for manufacturing printed matter, program, and print medium |
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| CN114055935A (en) * | 2020-07-30 | 2022-02-18 | 精工爱普生株式会社 | Ink jet method and ink jet recording apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103935131A (en) * | 2008-02-29 | 2014-07-23 | 株式会社御牧工程 | Inkjet printer |
| CN102371759A (en) * | 2010-08-10 | 2012-03-14 | 富士胶片株式会社 | Add-on type ultraviolet irradiation apparatus and image forming apparatus |
| CN102371759B (en) * | 2010-08-10 | 2015-07-22 | 富士胶片株式会社 | Add-on type ultraviolet irradiation apparatus and image forming apparatus |
| CN102765251A (en) * | 2011-05-03 | 2012-11-07 | 郑进 | Printing and duplicating equipment capable of generating duplication prevention bearing medium |
| CN105939854A (en) * | 2014-01-31 | 2016-09-14 | 株式会社御牧工程 | Inkjet printing apparatus, method for manufacturing printed matter, program, and print medium |
| CN105939854B (en) * | 2014-01-31 | 2017-07-28 | 株式会社御牧工程 | The manufacture method of ink-jet printing apparatus and printed article |
| JP2021091120A (en) * | 2019-12-09 | 2021-06-17 | セイコーエプソン株式会社 | Liquid jet device |
| JP7400422B2 (en) | 2019-12-09 | 2023-12-19 | セイコーエプソン株式会社 | liquid injection device |
| CN114055935A (en) * | 2020-07-30 | 2022-02-18 | 精工爱普生株式会社 | Ink jet method and ink jet recording apparatus |
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